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Commit | Line | Data |
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8f1d2e6f | 1 | #include "cache.h" |
961784ee | 2 | #include "tag.h" |
175785e5 | 3 | #include "commit.h" |
177722b3 | 4 | #include "commit-graph.h" |
6a1a79fd | 5 | #include "repository.h" |
cbd53a21 | 6 | #include "object-store.h" |
ed09aef0 | 7 | #include "pkt-line.h" |
52883fbd | 8 | #include "utf8.h" |
199c45bf JH |
9 | #include "diff.h" |
10 | #include "revision.h" | |
a97a7468 | 11 | #include "notes.h" |
14ba97f8 | 12 | #include "alloc.h" |
ba3c69a9 | 13 | #include "gpg-interface.h" |
46905893 | 14 | #include "mergesort.h" |
a84b794a | 15 | #include "commit-slab.h" |
da24b104 | 16 | #include "prio-queue.h" |
0a9136f3 | 17 | #include "sha1-lookup.h" |
d76650b8 | 18 | #include "wt-status.h" |
f9f99b3f | 19 | #include "advice.h" |
175785e5 | 20 | |
82a75299 JH |
21 | static struct commit_extra_header *read_commit_extra_header_lines(const char *buf, size_t len, const char **); |
22 | ||
60ab26de LT |
23 | int save_commit_buffer = 1; |
24 | ||
175785e5 DB |
25 | const char *commit_type = "commit"; |
26 | ||
d9a05e74 | 27 | struct commit *lookup_commit_reference_gently(struct repository *r, |
21e1ee8f | 28 | const struct object_id *oid, int quiet) |
961784ee | 29 | { |
d9a05e74 SB |
30 | struct object *obj = deref_tag(r, |
31 | parse_object(r, oid), | |
109cd76d | 32 | NULL, 0); |
961784ee LT |
33 | |
34 | if (!obj) | |
35 | return NULL; | |
d9a05e74 | 36 | return object_as_type(r, obj, OBJ_COMMIT, quiet); |
f76412ed JH |
37 | } |
38 | ||
1f6c72fe | 39 | struct commit *lookup_commit_reference(struct repository *r, const struct object_id *oid) |
f76412ed | 40 | { |
1f6c72fe | 41 | return lookup_commit_reference_gently(r, oid, 0); |
961784ee LT |
42 | } |
43 | ||
bc83266a | 44 | struct commit *lookup_commit_or_die(const struct object_id *oid, const char *ref_name) |
baf18fc2 | 45 | { |
2122f675 | 46 | struct commit *c = lookup_commit_reference(the_repository, oid); |
baf18fc2 NTND |
47 | if (!c) |
48 | die(_("could not parse %s"), ref_name); | |
9001dc2a | 49 | if (!oideq(oid, &c->object.oid)) { |
baf18fc2 | 50 | warning(_("%s %s is not a commit!"), |
bc83266a | 51 | ref_name, oid_to_hex(oid)); |
baf18fc2 NTND |
52 | } |
53 | return c; | |
54 | } | |
55 | ||
bacf1687 | 56 | struct commit *lookup_commit(struct repository *r, const struct object_id *oid) |
175785e5 | 57 | { |
bacf1687 | 58 | struct object *obj = lookup_object(r, oid->hash); |
d36f51c1 | 59 | if (!obj) |
bacf1687 SB |
60 | return create_object(r, oid->hash, |
61 | alloc_commit_node(r)); | |
62 | return object_as_type(r, obj, OBJ_COMMIT, 0); | |
175785e5 DB |
63 | } |
64 | ||
a6fa5992 PN |
65 | struct commit *lookup_commit_reference_by_name(const char *name) |
66 | { | |
7683e2e6 | 67 | struct object_id oid; |
a6fa5992 PN |
68 | struct commit *commit; |
69 | ||
e82caf38 | 70 | if (get_oid_committish(name, &oid)) |
a6fa5992 | 71 | return NULL; |
2122f675 | 72 | commit = lookup_commit_reference(the_repository, &oid); |
5e7d4d3e | 73 | if (parse_commit(commit)) |
a6fa5992 PN |
74 | return NULL; |
75 | return commit; | |
76 | } | |
77 | ||
dddbad72 | 78 | static timestamp_t parse_commit_date(const char *buf, const char *tail) |
175785e5 | 79 | { |
0a617799 | 80 | const char *dateptr; |
175785e5 | 81 | |
0a617799 MK |
82 | if (buf + 6 >= tail) |
83 | return 0; | |
175785e5 DB |
84 | if (memcmp(buf, "author", 6)) |
85 | return 0; | |
0a617799 | 86 | while (buf < tail && *buf++ != '\n') |
175785e5 | 87 | /* nada */; |
0a617799 MK |
88 | if (buf + 9 >= tail) |
89 | return 0; | |
175785e5 DB |
90 | if (memcmp(buf, "committer", 9)) |
91 | return 0; | |
0a617799 | 92 | while (buf < tail && *buf++ != '>') |
175785e5 | 93 | /* nada */; |
0a617799 MK |
94 | if (buf >= tail) |
95 | return 0; | |
96 | dateptr = buf; | |
97 | while (buf < tail && *buf++ != '\n') | |
98 | /* nada */; | |
99 | if (buf >= tail) | |
100 | return 0; | |
1aeb7e75 JS |
101 | /* dateptr < buf && buf[-1] == '\n', so parsing will stop at buf-1 */ |
102 | return parse_timestamp(dateptr, NULL, 10); | |
175785e5 DB |
103 | } |
104 | ||
0a9136f3 DD |
105 | static const unsigned char *commit_graft_sha1_access(size_t index, void *table) |
106 | { | |
107 | struct commit_graft **commit_graft_table = table; | |
7683e2e6 | 108 | return commit_graft_table[index]->oid.hash; |
0a9136f3 DD |
109 | } |
110 | ||
e808656c | 111 | static int commit_graft_pos(struct repository *r, const unsigned char *sha1) |
5da5c8f4 | 112 | { |
e808656c BW |
113 | return sha1_pos(sha1, r->parsed_objects->grafts, |
114 | r->parsed_objects->grafts_nr, | |
0a9136f3 | 115 | commit_graft_sha1_access); |
5da5c8f4 JH |
116 | } |
117 | ||
a3b78e83 BW |
118 | int register_commit_graft(struct repository *r, struct commit_graft *graft, |
119 | int ignore_dups) | |
5040f17e | 120 | { |
a3b78e83 | 121 | int pos = commit_graft_pos(r, graft->oid.hash); |
a6080a0a | 122 | |
5040f17e JH |
123 | if (0 <= pos) { |
124 | if (ignore_dups) | |
125 | free(graft); | |
126 | else { | |
a3b78e83 BW |
127 | free(r->parsed_objects->grafts[pos]); |
128 | r->parsed_objects->grafts[pos] = graft; | |
5040f17e JH |
129 | } |
130 | return 1; | |
131 | } | |
132 | pos = -pos - 1; | |
a3b78e83 BW |
133 | ALLOC_GROW(r->parsed_objects->grafts, |
134 | r->parsed_objects->grafts_nr + 1, | |
135 | r->parsed_objects->grafts_alloc); | |
136 | r->parsed_objects->grafts_nr++; | |
137 | if (pos < r->parsed_objects->grafts_nr) | |
138 | memmove(r->parsed_objects->grafts + pos + 1, | |
139 | r->parsed_objects->grafts + pos, | |
140 | (r->parsed_objects->grafts_nr - pos - 1) * | |
141 | sizeof(*r->parsed_objects->grafts)); | |
142 | r->parsed_objects->grafts[pos] = graft; | |
5040f17e JH |
143 | return 0; |
144 | } | |
145 | ||
9a934032 | 146 | struct commit_graft *read_graft_line(struct strbuf *line) |
5040f17e JH |
147 | { |
148 | /* The format is just "Commit Parent1 Parent2 ...\n" */ | |
cfa5bf16 PO |
149 | int i, phase; |
150 | const char *tail = NULL; | |
5040f17e | 151 | struct commit_graft *graft = NULL; |
cfa5bf16 | 152 | struct object_id dummy_oid, *oid; |
5040f17e | 153 | |
9a934032 PO |
154 | strbuf_rtrim(line); |
155 | if (!line->len || line->buf[0] == '#') | |
5bc4ce58 | 156 | return NULL; |
cfa5bf16 PO |
157 | /* |
158 | * phase 0 verifies line, counts hashes in line and allocates graft | |
159 | * phase 1 fills graft | |
160 | */ | |
161 | for (phase = 0; phase < 2; phase++) { | |
162 | oid = graft ? &graft->oid : &dummy_oid; | |
163 | if (parse_oid_hex(line->buf, oid, &tail)) | |
5040f17e | 164 | goto bad_graft_data; |
cfa5bf16 PO |
165 | for (i = 0; *tail != '\0'; i++) { |
166 | oid = graft ? &graft->parent[i] : &dummy_oid; | |
167 | if (!isspace(*tail++) || parse_oid_hex(tail, oid, &tail)) | |
168 | goto bad_graft_data; | |
169 | } | |
170 | if (!graft) { | |
171 | graft = xmalloc(st_add(sizeof(*graft), | |
172 | st_mult(sizeof(struct object_id), i))); | |
173 | graft->nr_parent = i; | |
174 | } | |
5040f17e JH |
175 | } |
176 | return graft; | |
df5d43be RT |
177 | |
178 | bad_graft_data: | |
9a934032 | 179 | error("bad graft data: %s", line->buf); |
cfa5bf16 | 180 | assert(!graft); |
df5d43be | 181 | return NULL; |
5040f17e JH |
182 | } |
183 | ||
d0e5dd0e | 184 | static int read_graft_file(struct repository *r, const char *graft_file) |
5da5c8f4 | 185 | { |
e9d983f1 | 186 | FILE *fp = fopen_or_warn(graft_file, "r"); |
e228c173 | 187 | struct strbuf buf = STRBUF_INIT; |
5040f17e JH |
188 | if (!fp) |
189 | return -1; | |
f9f99b3f JS |
190 | if (advice_graft_file_deprecated) |
191 | advise(_("Support for <GIT_DIR>/info/grafts is deprecated\n" | |
192 | "and will be removed in a future Git version.\n" | |
193 | "\n" | |
194 | "Please use \"git replace --convert-graft-file\"\n" | |
195 | "to convert the grafts into replace refs.\n" | |
196 | "\n" | |
197 | "Turn this message off by running\n" | |
198 | "\"git config advice.graftFileDeprecated false\"")); | |
e228c173 | 199 | while (!strbuf_getwholeline(&buf, fp, '\n')) { |
5da5c8f4 | 200 | /* The format is just "Commit Parent1 Parent2 ...\n" */ |
9a934032 | 201 | struct commit_graft *graft = read_graft_line(&buf); |
5bc4ce58 JH |
202 | if (!graft) |
203 | continue; | |
d0e5dd0e | 204 | if (register_commit_graft(r, graft, 1)) |
e228c173 | 205 | error("duplicate graft data: %s", buf.buf); |
5da5c8f4 JH |
206 | } |
207 | fclose(fp); | |
e228c173 | 208 | strbuf_release(&buf); |
5040f17e JH |
209 | return 0; |
210 | } | |
211 | ||
2f6c767f | 212 | static void prepare_commit_graft(struct repository *r) |
5040f17e | 213 | { |
5040f17e JH |
214 | char *graft_file; |
215 | ||
2f6c767f | 216 | if (r->parsed_objects->commit_graft_prepared) |
5040f17e | 217 | return; |
14a9bd28 JK |
218 | if (!startup_info->have_repository) |
219 | return; | |
220 | ||
2f6c767f SB |
221 | graft_file = get_graft_file(r); |
222 | read_graft_file(r, graft_file); | |
ed09aef0 | 223 | /* make sure shallows are read */ |
2f6c767f SB |
224 | is_repository_shallow(r); |
225 | r->parsed_objects->commit_graft_prepared = 1; | |
5da5c8f4 JH |
226 | } |
227 | ||
b9dbddf6 | 228 | struct commit_graft *lookup_commit_graft(struct repository *r, const struct object_id *oid) |
5da5c8f4 JH |
229 | { |
230 | int pos; | |
b9dbddf6 SB |
231 | prepare_commit_graft(r); |
232 | pos = commit_graft_pos(r, oid->hash); | |
5da5c8f4 JH |
233 | if (pos < 0) |
234 | return NULL; | |
b9dbddf6 | 235 | return r->parsed_objects->grafts[pos]; |
5da5c8f4 JH |
236 | } |
237 | ||
09d46644 | 238 | int for_each_commit_graft(each_commit_graft_fn fn, void *cb_data) |
ed09aef0 | 239 | { |
09d46644 | 240 | int i, ret; |
6a1a79fd JN |
241 | for (i = ret = 0; i < the_repository->parsed_objects->grafts_nr && !ret; i++) |
242 | ret = fn(the_repository->parsed_objects->grafts[i], cb_data); | |
09d46644 | 243 | return ret; |
ed09aef0 JS |
244 | } |
245 | ||
e92b848c | 246 | int unregister_shallow(const struct object_id *oid) |
f53514bc | 247 | { |
be479e80 | 248 | int pos = commit_graft_pos(the_repository, oid->hash); |
f53514bc JS |
249 | if (pos < 0) |
250 | return -1; | |
6a1a79fd JN |
251 | if (pos + 1 < the_repository->parsed_objects->grafts_nr) |
252 | MOVE_ARRAY(the_repository->parsed_objects->grafts + pos, | |
253 | the_repository->parsed_objects->grafts + pos + 1, | |
254 | the_repository->parsed_objects->grafts_nr - pos - 1); | |
255 | the_repository->parsed_objects->grafts_nr--; | |
f53514bc JS |
256 | return 0; |
257 | } | |
258 | ||
8597ea3a JK |
259 | struct commit_buffer { |
260 | void *buffer; | |
261 | unsigned long size; | |
262 | }; | |
263 | define_commit_slab(buffer_slab, struct commit_buffer); | |
c1b3c71f | 264 | |
65ea9d4b | 265 | struct buffer_slab *allocate_commit_buffer_slab(void) |
66c2827e | 266 | { |
65ea9d4b SB |
267 | struct buffer_slab *bs = xmalloc(sizeof(*bs)); |
268 | init_buffer_slab(bs); | |
269 | return bs; | |
270 | } | |
271 | ||
272 | void free_commit_buffer_slab(struct buffer_slab *bs) | |
273 | { | |
274 | clear_buffer_slab(bs); | |
275 | free(bs); | |
276 | } | |
c1b3c71f | 277 | |
1a40fc45 | 278 | void set_commit_buffer(struct repository *r, struct commit *commit, void *buffer, unsigned long size) |
66c2827e | 279 | { |
65ea9d4b | 280 | struct commit_buffer *v = buffer_slab_at( |
1a40fc45 | 281 | r->parsed_objects->buffer_slab, commit); |
8597ea3a JK |
282 | v->buffer = buffer; |
283 | v->size = size; | |
66c2827e JK |
284 | } |
285 | ||
4ff7e5c9 | 286 | const void *get_cached_commit_buffer(struct repository *r, const struct commit *commit, unsigned long *sizep) |
152ff1cc | 287 | { |
65ea9d4b | 288 | struct commit_buffer *v = buffer_slab_peek( |
4ff7e5c9 | 289 | r->parsed_objects->buffer_slab, commit); |
862e730e JH |
290 | if (!v) { |
291 | if (sizep) | |
292 | *sizep = 0; | |
293 | return NULL; | |
294 | } | |
8597ea3a JK |
295 | if (sizep) |
296 | *sizep = v->size; | |
297 | return v->buffer; | |
152ff1cc JK |
298 | } |
299 | ||
8597ea3a | 300 | const void *get_commit_buffer(const struct commit *commit, unsigned long *sizep) |
152ff1cc | 301 | { |
3ce85f7e | 302 | const void *ret = get_cached_commit_buffer(the_repository, commit, sizep); |
152ff1cc JK |
303 | if (!ret) { |
304 | enum object_type type; | |
305 | unsigned long size; | |
b4f5aca4 | 306 | ret = read_object_file(&commit->object.oid, &type, &size); |
152ff1cc JK |
307 | if (!ret) |
308 | die("cannot read commit object %s", | |
f2fd0760 | 309 | oid_to_hex(&commit->object.oid)); |
152ff1cc JK |
310 | if (type != OBJ_COMMIT) |
311 | die("expected commit for %s, got %s", | |
debca9d2 | 312 | oid_to_hex(&commit->object.oid), type_name(type)); |
8597ea3a JK |
313 | if (sizep) |
314 | *sizep = size; | |
152ff1cc JK |
315 | } |
316 | return ret; | |
317 | } | |
318 | ||
319 | void unuse_commit_buffer(const struct commit *commit, const void *buffer) | |
320 | { | |
65ea9d4b SB |
321 | struct commit_buffer *v = buffer_slab_peek( |
322 | the_repository->parsed_objects->buffer_slab, commit); | |
862e730e | 323 | if (!(v && v->buffer == buffer)) |
152ff1cc JK |
324 | free((void *)buffer); |
325 | } | |
326 | ||
0fb370da JK |
327 | void free_commit_buffer(struct commit *commit) |
328 | { | |
65ea9d4b SB |
329 | struct commit_buffer *v = buffer_slab_peek( |
330 | the_repository->parsed_objects->buffer_slab, commit); | |
862e730e | 331 | if (v) { |
6a83d902 | 332 | FREE_AND_NULL(v->buffer); |
862e730e JH |
333 | v->size = 0; |
334 | } | |
0fb370da JK |
335 | } |
336 | ||
5bb03de1 DS |
337 | struct tree *get_commit_tree(const struct commit *commit) |
338 | { | |
7b8a21db DS |
339 | if (commit->maybe_tree || !commit->object.parsed) |
340 | return commit->maybe_tree; | |
341 | ||
342 | if (commit->graph_pos == COMMIT_NOT_FROM_GRAPH) | |
343 | BUG("commit has NULL tree, but was not loaded from commit-graph"); | |
344 | ||
dade47c0 | 345 | return get_commit_tree_in_graph(the_repository, commit); |
5bb03de1 DS |
346 | } |
347 | ||
348 | struct object_id *get_commit_tree_oid(const struct commit *commit) | |
349 | { | |
350 | return &get_commit_tree(commit)->object.oid; | |
351 | } | |
352 | ||
14ba97f8 SB |
353 | void release_commit_memory(struct commit *c) |
354 | { | |
11024058 | 355 | c->maybe_tree = NULL; |
14ba97f8 SB |
356 | c->index = 0; |
357 | free_commit_buffer(c); | |
358 | free_commit_list(c->parents); | |
359 | /* TODO: what about commit->util? */ | |
360 | ||
361 | c->object.parsed = 0; | |
362 | } | |
363 | ||
8597ea3a | 364 | const void *detach_commit_buffer(struct commit *commit, unsigned long *sizep) |
0fb370da | 365 | { |
65ea9d4b SB |
366 | struct commit_buffer *v = buffer_slab_peek( |
367 | the_repository->parsed_objects->buffer_slab, commit); | |
8597ea3a JK |
368 | void *ret; |
369 | ||
862e730e JH |
370 | if (!v) { |
371 | if (sizep) | |
372 | *sizep = 0; | |
373 | return NULL; | |
374 | } | |
8597ea3a JK |
375 | ret = v->buffer; |
376 | if (sizep) | |
377 | *sizep = v->size; | |
378 | ||
379 | v->buffer = NULL; | |
380 | v->size = 0; | |
0fb370da JK |
381 | return ret; |
382 | } | |
383 | ||
fd8030c7 | 384 | int parse_commit_buffer(struct repository *r, struct commit *item, const void *buffer, unsigned long size, int check_graph) |
175785e5 | 385 | { |
cf7b1cad NTND |
386 | const char *tail = buffer; |
387 | const char *bufptr = buffer; | |
7683e2e6 | 388 | struct object_id parent; |
6c88be16 | 389 | struct commit_list **pptr; |
5da5c8f4 | 390 | struct commit_graft *graft; |
2770ccbd | 391 | const int tree_entry_len = the_hash_algo->hexsz + 5; |
392 | const int parent_entry_len = the_hash_algo->hexsz + 7; | |
bd2c39f5 | 393 | |
175785e5 DB |
394 | if (item->object.parsed) |
395 | return 0; | |
396 | item->object.parsed = 1; | |
3b44f15a | 397 | tail += size; |
7683e2e6 | 398 | if (tail <= bufptr + tree_entry_len + 1 || memcmp(bufptr, "tree ", 5) || |
399 | bufptr[tree_entry_len] != '\n') | |
f2fd0760 | 400 | return error("bogus commit object %s", oid_to_hex(&item->object.oid)); |
26ea3e7d | 401 | if (get_oid_hex(bufptr + 5, &parent) < 0) |
bd2afde8 | 402 | return error("bad tree pointer in commit %s", |
f2fd0760 | 403 | oid_to_hex(&item->object.oid)); |
fd8030c7 | 404 | item->maybe_tree = lookup_tree(r, &parent); |
7683e2e6 | 405 | bufptr += tree_entry_len + 1; /* "tree " + "hex sha1" + "\n" */ |
6c88be16 | 406 | pptr = &item->parents; |
5da5c8f4 | 407 | |
fd8030c7 | 408 | graft = lookup_commit_graft(r, &item->object.oid); |
7683e2e6 | 409 | while (bufptr + parent_entry_len < tail && !memcmp(bufptr, "parent ", 7)) { |
f7cc77d7 LT |
410 | struct commit *new_parent; |
411 | ||
7683e2e6 | 412 | if (tail <= bufptr + parent_entry_len + 1 || |
26ea3e7d | 413 | get_oid_hex(bufptr + 7, &parent) || |
7683e2e6 | 414 | bufptr[parent_entry_len] != '\n') |
f2fd0760 | 415 | return error("bad parents in commit %s", oid_to_hex(&item->object.oid)); |
7683e2e6 | 416 | bufptr += parent_entry_len + 1; |
7f3140cd JS |
417 | /* |
418 | * The clone is shallow if nr_parent < 0, and we must | |
419 | * not traverse its real parents even when we unhide them. | |
420 | */ | |
421 | if (graft && (graft->nr_parent < 0 || grafts_replace_parents)) | |
5da5c8f4 | 422 | continue; |
fd8030c7 | 423 | new_parent = lookup_commit(r, &parent); |
39468def | 424 | if (new_parent) |
6c88be16 | 425 | pptr = &commit_list_insert(new_parent, pptr)->next; |
5da5c8f4 JH |
426 | } |
427 | if (graft) { | |
428 | int i; | |
429 | struct commit *new_parent; | |
430 | for (i = 0; i < graft->nr_parent; i++) { | |
fd8030c7 | 431 | new_parent = lookup_commit(r, |
c1f5eb49 | 432 | &graft->parent[i]); |
5da5c8f4 JH |
433 | if (!new_parent) |
434 | continue; | |
435 | pptr = &commit_list_insert(new_parent, pptr)->next; | |
5da5c8f4 | 436 | } |
175785e5 | 437 | } |
0a617799 | 438 | item->date = parse_commit_date(bufptr, tail); |
27dedf0c | 439 | |
e2838d85 | 440 | if (check_graph) |
dade47c0 | 441 | load_commit_graph_info(the_repository, item); |
e2838d85 | 442 | |
175785e5 DB |
443 | return 0; |
444 | } | |
445 | ||
9b19adac | 446 | int parse_commit_internal(struct commit *item, int quiet_on_missing, int use_commit_graph) |
bd2c39f5 | 447 | { |
21666f1a | 448 | enum object_type type; |
bd2c39f5 NP |
449 | void *buffer; |
450 | unsigned long size; | |
451 | int ret; | |
452 | ||
9786f68b MK |
453 | if (!item) |
454 | return -1; | |
bd2c39f5 NP |
455 | if (item->object.parsed) |
456 | return 0; | |
dade47c0 | 457 | if (use_commit_graph && parse_commit_in_graph(the_repository, item)) |
177722b3 | 458 | return 0; |
b4f5aca4 | 459 | buffer = read_object_file(&item->object.oid, &type, &size); |
bd2c39f5 | 460 | if (!buffer) |
9cc2b07a JK |
461 | return quiet_on_missing ? -1 : |
462 | error("Could not read %s", | |
f2fd0760 | 463 | oid_to_hex(&item->object.oid)); |
21666f1a | 464 | if (type != OBJ_COMMIT) { |
bd2c39f5 NP |
465 | free(buffer); |
466 | return error("Object %s not a commit", | |
f2fd0760 | 467 | oid_to_hex(&item->object.oid)); |
bd2c39f5 | 468 | } |
9b19adac | 469 | |
08f4f445 | 470 | ret = parse_commit_buffer(the_repository, item, buffer, size, 0); |
60ab26de | 471 | if (save_commit_buffer && !ret) { |
5e0c6360 | 472 | set_commit_buffer(the_repository, item, buffer, size); |
3ff1fbbb LT |
473 | return 0; |
474 | } | |
bd2c39f5 NP |
475 | free(buffer); |
476 | return ret; | |
477 | } | |
478 | ||
9b19adac DS |
479 | int parse_commit_gently(struct commit *item, int quiet_on_missing) |
480 | { | |
481 | return parse_commit_internal(item, quiet_on_missing, 1); | |
482 | } | |
483 | ||
7059dccc JK |
484 | void parse_commit_or_die(struct commit *item) |
485 | { | |
486 | if (parse_commit(item)) | |
487 | die("unable to parse commit %s", | |
f2fd0760 | 488 | item ? oid_to_hex(&item->object.oid) : "(null)"); |
7059dccc JK |
489 | } |
490 | ||
11af2aae CC |
491 | int find_commit_subject(const char *commit_buffer, const char **subject) |
492 | { | |
493 | const char *eol; | |
494 | const char *p = commit_buffer; | |
495 | ||
496 | while (*p && (*p != '\n' || p[1] != '\n')) | |
497 | p++; | |
498 | if (*p) { | |
4e1b06da | 499 | p = skip_blank_lines(p + 2); |
9c9b03b1 | 500 | eol = strchrnul(p, '\n'); |
11af2aae CC |
501 | } else |
502 | eol = p; | |
503 | ||
504 | *subject = p; | |
505 | ||
506 | return eol - p; | |
507 | } | |
508 | ||
ac5155ef | 509 | struct commit_list *commit_list_insert(struct commit *item, struct commit_list **list_p) |
dd97f850 | 510 | { |
812666c8 | 511 | struct commit_list *new_list = xmalloc(sizeof(struct commit_list)); |
dd97f850 DB |
512 | new_list->item = item; |
513 | new_list->next = *list_p; | |
514 | *list_p = new_list; | |
ac5155ef | 515 | return new_list; |
dd97f850 DB |
516 | } |
517 | ||
65319475 MV |
518 | unsigned commit_list_count(const struct commit_list *l) |
519 | { | |
520 | unsigned c = 0; | |
521 | for (; l; l = l->next ) | |
522 | c++; | |
523 | return c; | |
524 | } | |
525 | ||
53d00b39 TR |
526 | struct commit_list *copy_commit_list(struct commit_list *list) |
527 | { | |
528 | struct commit_list *head = NULL; | |
529 | struct commit_list **pp = &head; | |
530 | while (list) { | |
cb979dbd | 531 | pp = commit_list_append(list->item, pp); |
53d00b39 TR |
532 | list = list->next; |
533 | } | |
534 | return head; | |
535 | } | |
536 | ||
175785e5 DB |
537 | void free_commit_list(struct commit_list *list) |
538 | { | |
e510ab89 RS |
539 | while (list) |
540 | pop_commit(&list); | |
175785e5 | 541 | } |
dd97f850 | 542 | |
47e44ed1 | 543 | struct commit_list * commit_list_insert_by_date(struct commit *item, struct commit_list **list) |
dd97f850 DB |
544 | { |
545 | struct commit_list **pp = list; | |
546 | struct commit_list *p; | |
547 | while ((p = *pp) != NULL) { | |
548 | if (p->item->date < item->date) { | |
549 | break; | |
550 | } | |
551 | pp = &p->next; | |
552 | } | |
f755494c | 553 | return commit_list_insert(item, pp); |
dd97f850 DB |
554 | } |
555 | ||
46905893 RS |
556 | static int commit_list_compare_by_date(const void *a, const void *b) |
557 | { | |
dddbad72 JS |
558 | timestamp_t a_date = ((const struct commit_list *)a)->item->date; |
559 | timestamp_t b_date = ((const struct commit_list *)b)->item->date; | |
46905893 RS |
560 | if (a_date < b_date) |
561 | return 1; | |
562 | if (a_date > b_date) | |
563 | return -1; | |
564 | return 0; | |
565 | } | |
566 | ||
567 | static void *commit_list_get_next(const void *a) | |
568 | { | |
569 | return ((const struct commit_list *)a)->next; | |
570 | } | |
571 | ||
572 | static void commit_list_set_next(void *a, void *next) | |
573 | { | |
574 | ((struct commit_list *)a)->next = next; | |
575 | } | |
a6080a0a | 576 | |
47e44ed1 | 577 | void commit_list_sort_by_date(struct commit_list **list) |
dd97f850 | 578 | { |
7365c95d JH |
579 | *list = llist_mergesort(*list, commit_list_get_next, commit_list_set_next, |
580 | commit_list_compare_by_date); | |
dd97f850 DB |
581 | } |
582 | ||
58e28af6 DB |
583 | struct commit *pop_most_recent_commit(struct commit_list **list, |
584 | unsigned int mark) | |
dd97f850 | 585 | { |
e510ab89 | 586 | struct commit *ret = pop_commit(list); |
dd97f850 | 587 | struct commit_list *parents = ret->parents; |
dd97f850 DB |
588 | |
589 | while (parents) { | |
4056c091 | 590 | struct commit *commit = parents->item; |
dec38c81 | 591 | if (!parse_commit(commit) && !(commit->object.flags & mark)) { |
58e28af6 | 592 | commit->object.flags |= mark; |
47e44ed1 | 593 | commit_list_insert_by_date(commit, list); |
4056c091 | 594 | } |
dd97f850 DB |
595 | parents = parents->next; |
596 | } | |
597 | return ret; | |
598 | } | |
e3bc7a3b | 599 | |
941ba8db NTND |
600 | static void clear_commit_marks_1(struct commit_list **plist, |
601 | struct commit *commit, unsigned int mark) | |
f8f9c73c | 602 | { |
60fcc2e6 JS |
603 | while (commit) { |
604 | struct commit_list *parents; | |
f8f9c73c | 605 | |
60fcc2e6 JS |
606 | if (!(mark & commit->object.flags)) |
607 | return; | |
58ecf5c1 | 608 | |
60fcc2e6 JS |
609 | commit->object.flags &= ~mark; |
610 | ||
611 | parents = commit->parents; | |
612 | if (!parents) | |
613 | return; | |
614 | ||
615 | while ((parents = parents->next)) | |
941ba8db | 616 | commit_list_insert(parents->item, plist); |
60fcc2e6 JS |
617 | |
618 | commit = commit->parents->item; | |
f8f9c73c JH |
619 | } |
620 | } | |
621 | ||
e895cb51 | 622 | void clear_commit_marks_many(int nr, struct commit **commit, unsigned int mark) |
941ba8db NTND |
623 | { |
624 | struct commit_list *list = NULL; | |
e895cb51 JH |
625 | |
626 | while (nr--) { | |
07f7d55a | 627 | clear_commit_marks_1(&list, *commit, mark); |
e895cb51 JH |
628 | commit++; |
629 | } | |
941ba8db NTND |
630 | while (list) |
631 | clear_commit_marks_1(&list, pop_commit(&list), mark); | |
632 | } | |
633 | ||
e895cb51 JH |
634 | void clear_commit_marks(struct commit *commit, unsigned int mark) |
635 | { | |
636 | clear_commit_marks_many(1, &commit, mark); | |
637 | } | |
638 | ||
a3437b8c JS |
639 | struct commit *pop_commit(struct commit_list **stack) |
640 | { | |
641 | struct commit_list *top = *stack; | |
642 | struct commit *item = top ? top->item : NULL; | |
643 | ||
644 | if (top) { | |
645 | *stack = top->next; | |
646 | free(top); | |
647 | } | |
648 | return item; | |
649 | } | |
650 | ||
a84b794a JH |
651 | /* |
652 | * Topological sort support | |
653 | */ | |
96c4f4a3 | 654 | |
a84b794a JH |
655 | /* count number of children that have not been emitted */ |
656 | define_commit_slab(indegree_slab, int); | |
96c4f4a3 | 657 | |
81c6b38b | 658 | /* record author-date for each commit object */ |
18207030 | 659 | define_commit_slab(author_date_slab, timestamp_t); |
81c6b38b JH |
660 | |
661 | static void record_author_date(struct author_date_slab *author_date, | |
662 | struct commit *commit) | |
663 | { | |
8597ea3a | 664 | const char *buffer = get_commit_buffer(commit, NULL); |
81c6b38b | 665 | struct ident_split ident; |
ea5517f0 JK |
666 | const char *ident_line; |
667 | size_t ident_len; | |
81c6b38b | 668 | char *date_end; |
dddbad72 | 669 | timestamp_t date; |
81c6b38b | 670 | |
ea5517f0 JK |
671 | ident_line = find_commit_header(buffer, "author", &ident_len); |
672 | if (!ident_line) | |
673 | goto fail_exit; /* no author line */ | |
674 | if (split_ident_line(&ident, ident_line, ident_len) || | |
675 | !ident.date_begin || !ident.date_end) | |
676 | goto fail_exit; /* malformed "author" line */ | |
81c6b38b | 677 | |
1aeb7e75 | 678 | date = parse_timestamp(ident.date_begin, &date_end, 10); |
81c6b38b JH |
679 | if (date_end != ident.date_end) |
680 | goto fail_exit; /* malformed date */ | |
681 | *(author_date_slab_at(author_date, commit)) = date; | |
682 | ||
683 | fail_exit: | |
ba41c1c9 | 684 | unuse_commit_buffer(commit, buffer); |
81c6b38b JH |
685 | } |
686 | ||
687 | static int compare_commits_by_author_date(const void *a_, const void *b_, | |
688 | void *cb_data) | |
689 | { | |
690 | const struct commit *a = a_, *b = b_; | |
691 | struct author_date_slab *author_date = cb_data; | |
dddbad72 JS |
692 | timestamp_t a_date = *(author_date_slab_at(author_date, a)); |
693 | timestamp_t b_date = *(author_date_slab_at(author_date, b)); | |
81c6b38b JH |
694 | |
695 | /* newer commits with larger date first */ | |
696 | if (a_date < b_date) | |
697 | return 1; | |
698 | else if (a_date > b_date) | |
699 | return -1; | |
700 | return 0; | |
701 | } | |
702 | ||
3afc679b DS |
703 | int compare_commits_by_gen_then_commit_date(const void *a_, const void *b_, void *unused) |
704 | { | |
705 | const struct commit *a = a_, *b = b_; | |
706 | ||
707 | /* newer commits first */ | |
708 | if (a->generation < b->generation) | |
709 | return 1; | |
710 | else if (a->generation > b->generation) | |
711 | return -1; | |
712 | ||
713 | /* use date as a heuristic when generations are equal */ | |
714 | if (a->date < b->date) | |
715 | return 1; | |
716 | else if (a->date > b->date) | |
717 | return -1; | |
718 | return 0; | |
719 | } | |
720 | ||
727377ff | 721 | int compare_commits_by_commit_date(const void *a_, const void *b_, void *unused) |
da24b104 JH |
722 | { |
723 | const struct commit *a = a_, *b = b_; | |
724 | /* newer commits with larger date first */ | |
725 | if (a->date < b->date) | |
726 | return 1; | |
727 | else if (a->date > b->date) | |
728 | return -1; | |
729 | return 0; | |
730 | } | |
731 | ||
ab580ace JS |
732 | /* |
733 | * Performs an in-place topological sort on the list supplied. | |
734 | */ | |
da24b104 | 735 | void sort_in_topological_order(struct commit_list **list, enum rev_sort_order sort_order) |
6b6dcfc2 | 736 | { |
23c17d4a | 737 | struct commit_list *next, *orig = *list; |
23c17d4a | 738 | struct commit_list **pptr; |
a84b794a | 739 | struct indegree_slab indegree; |
da24b104 JH |
740 | struct prio_queue queue; |
741 | struct commit *commit; | |
81c6b38b | 742 | struct author_date_slab author_date; |
a6080a0a | 743 | |
23c17d4a | 744 | if (!orig) |
7d6fb370 | 745 | return; |
23c17d4a LT |
746 | *list = NULL; |
747 | ||
a84b794a | 748 | init_indegree_slab(&indegree); |
da24b104 | 749 | memset(&queue, '\0', sizeof(queue)); |
81c6b38b | 750 | |
da24b104 JH |
751 | switch (sort_order) { |
752 | default: /* REV_SORT_IN_GRAPH_ORDER */ | |
753 | queue.compare = NULL; | |
754 | break; | |
755 | case REV_SORT_BY_COMMIT_DATE: | |
756 | queue.compare = compare_commits_by_commit_date; | |
757 | break; | |
81c6b38b JH |
758 | case REV_SORT_BY_AUTHOR_DATE: |
759 | init_author_date_slab(&author_date); | |
760 | queue.compare = compare_commits_by_author_date; | |
761 | queue.cb_data = &author_date; | |
762 | break; | |
da24b104 | 763 | } |
96c4f4a3 | 764 | |
23c17d4a LT |
765 | /* Mark them and clear the indegree */ |
766 | for (next = orig; next; next = next->next) { | |
767 | struct commit *commit = next->item; | |
a84b794a | 768 | *(indegree_slab_at(&indegree, commit)) = 1; |
81c6b38b JH |
769 | /* also record the author dates, if needed */ |
770 | if (sort_order == REV_SORT_BY_AUTHOR_DATE) | |
771 | record_author_date(&author_date, commit); | |
ab580ace | 772 | } |
23c17d4a | 773 | |
ab580ace | 774 | /* update the indegree */ |
23c17d4a | 775 | for (next = orig; next; next = next->next) { |
da24b104 | 776 | struct commit_list *parents = next->item->parents; |
ab580ace | 777 | while (parents) { |
23c17d4a | 778 | struct commit *parent = parents->item; |
a84b794a | 779 | int *pi = indegree_slab_at(&indegree, parent); |
6b6dcfc2 | 780 | |
96c4f4a3 JK |
781 | if (*pi) |
782 | (*pi)++; | |
23c17d4a | 783 | parents = parents->next; |
ab580ace | 784 | } |
ab580ace | 785 | } |
23c17d4a | 786 | |
a6080a0a | 787 | /* |
674d1727 PH |
788 | * find the tips |
789 | * | |
790 | * tips are nodes not reachable from any other node in the list | |
791 | * | |
792 | * the tips serve as a starting set for the work queue. | |
793 | */ | |
23c17d4a LT |
794 | for (next = orig; next; next = next->next) { |
795 | struct commit *commit = next->item; | |
ab580ace | 796 | |
a84b794a | 797 | if (*(indegree_slab_at(&indegree, commit)) == 1) |
da24b104 | 798 | prio_queue_put(&queue, commit); |
ab580ace | 799 | } |
4c8725f1 | 800 | |
da24b104 JH |
801 | /* |
802 | * This is unfortunate; the initial tips need to be shown | |
803 | * in the order given from the revision traversal machinery. | |
804 | */ | |
805 | if (sort_order == REV_SORT_IN_GRAPH_ORDER) | |
806 | prio_queue_reverse(&queue); | |
807 | ||
808 | /* We no longer need the commit list */ | |
809 | free_commit_list(orig); | |
23c17d4a LT |
810 | |
811 | pptr = list; | |
812 | *list = NULL; | |
da24b104 JH |
813 | while ((commit = prio_queue_get(&queue)) != NULL) { |
814 | struct commit_list *parents; | |
23c17d4a | 815 | |
23c17d4a | 816 | for (parents = commit->parents; parents ; parents = parents->next) { |
cd2b8ae9 | 817 | struct commit *parent = parents->item; |
a84b794a | 818 | int *pi = indegree_slab_at(&indegree, parent); |
23c17d4a | 819 | |
96c4f4a3 | 820 | if (!*pi) |
23c17d4a LT |
821 | continue; |
822 | ||
823 | /* | |
824 | * parents are only enqueued for emission | |
825 | * when all their children have been emitted thereby | |
826 | * guaranteeing topological order. | |
827 | */ | |
da24b104 JH |
828 | if (--(*pi) == 1) |
829 | prio_queue_put(&queue, parent); | |
ab580ace JS |
830 | } |
831 | /* | |
da24b104 JH |
832 | * all children of commit have already been |
833 | * emitted. we can emit it now. | |
674d1727 | 834 | */ |
a84b794a | 835 | *(indegree_slab_at(&indegree, commit)) = 0; |
da24b104 JH |
836 | |
837 | pptr = &commit_list_insert(commit, pptr)->next; | |
ab580ace | 838 | } |
96c4f4a3 | 839 | |
a84b794a | 840 | clear_indegree_slab(&indegree); |
da24b104 | 841 | clear_prio_queue(&queue); |
81c6b38b JH |
842 | if (sort_order == REV_SORT_BY_AUTHOR_DATE) |
843 | clear_author_date_slab(&author_date); | |
ab580ace | 844 | } |
7c6f8aaf | 845 | |
ba3c69a9 JH |
846 | static const char gpg_sig_header[] = "gpgsig"; |
847 | static const int gpg_sig_header_len = sizeof(gpg_sig_header) - 1; | |
848 | ||
849 | static int do_sign_commit(struct strbuf *buf, const char *keyid) | |
850 | { | |
851 | struct strbuf sig = STRBUF_INIT; | |
852 | int inspos, copypos; | |
3324dd8f | 853 | const char *eoh; |
ba3c69a9 JH |
854 | |
855 | /* find the end of the header */ | |
3324dd8f JS |
856 | eoh = strstr(buf->buf, "\n\n"); |
857 | if (!eoh) | |
858 | inspos = buf->len; | |
859 | else | |
860 | inspos = eoh - buf->buf + 1; | |
ba3c69a9 JH |
861 | |
862 | if (!keyid || !*keyid) | |
863 | keyid = get_signing_key(); | |
864 | if (sign_buffer(buf, &sig, keyid)) { | |
865 | strbuf_release(&sig); | |
866 | return -1; | |
867 | } | |
868 | ||
869 | for (copypos = 0; sig.buf[copypos]; ) { | |
870 | const char *bol = sig.buf + copypos; | |
871 | const char *eol = strchrnul(bol, '\n'); | |
872 | int len = (eol - bol) + !!*eol; | |
873 | ||
874 | if (!copypos) { | |
875 | strbuf_insert(buf, inspos, gpg_sig_header, gpg_sig_header_len); | |
876 | inspos += gpg_sig_header_len; | |
877 | } | |
878 | strbuf_insert(buf, inspos++, " ", 1); | |
879 | strbuf_insert(buf, inspos, bol, len); | |
880 | inspos += len; | |
881 | copypos += len; | |
882 | } | |
883 | strbuf_release(&sig); | |
884 | return 0; | |
885 | } | |
886 | ||
218aa3a6 | 887 | int parse_signed_commit(const struct commit *commit, |
0c37f1fc JH |
888 | struct strbuf *payload, struct strbuf *signature) |
889 | { | |
218aa3a6 | 890 | |
0c37f1fc | 891 | unsigned long size; |
218aa3a6 | 892 | const char *buffer = get_commit_buffer(commit, &size); |
0c37f1fc | 893 | int in_signature, saw_signature = -1; |
218aa3a6 | 894 | const char *line, *tail; |
0c37f1fc JH |
895 | |
896 | line = buffer; | |
897 | tail = buffer + size; | |
898 | in_signature = 0; | |
899 | saw_signature = 0; | |
900 | while (line < tail) { | |
901 | const char *sig = NULL; | |
218aa3a6 | 902 | const char *next = memchr(line, '\n', tail - line); |
0c37f1fc JH |
903 | |
904 | next = next ? next + 1 : tail; | |
905 | if (in_signature && line[0] == ' ') | |
906 | sig = line + 1; | |
59556548 | 907 | else if (starts_with(line, gpg_sig_header) && |
0c37f1fc JH |
908 | line[gpg_sig_header_len] == ' ') |
909 | sig = line + gpg_sig_header_len + 1; | |
910 | if (sig) { | |
911 | strbuf_add(signature, sig, next - sig); | |
912 | saw_signature = 1; | |
913 | in_signature = 1; | |
914 | } else { | |
915 | if (*line == '\n') | |
916 | /* dump the whole remainder of the buffer */ | |
917 | next = tail; | |
918 | strbuf_add(payload, line, next - line); | |
919 | in_signature = 0; | |
920 | } | |
921 | line = next; | |
922 | } | |
218aa3a6 | 923 | unuse_commit_buffer(commit, buffer); |
0c37f1fc JH |
924 | return saw_signature; |
925 | } | |
926 | ||
0b05ab6f CC |
927 | int remove_signature(struct strbuf *buf) |
928 | { | |
929 | const char *line = buf->buf; | |
930 | const char *tail = buf->buf + buf->len; | |
931 | int in_signature = 0; | |
932 | const char *sig_start = NULL; | |
933 | const char *sig_end = NULL; | |
934 | ||
935 | while (line < tail) { | |
936 | const char *next = memchr(line, '\n', tail - line); | |
937 | next = next ? next + 1 : tail; | |
938 | ||
939 | if (in_signature && line[0] == ' ') | |
940 | sig_end = next; | |
941 | else if (starts_with(line, gpg_sig_header) && | |
942 | line[gpg_sig_header_len] == ' ') { | |
943 | sig_start = line; | |
944 | sig_end = next; | |
945 | in_signature = 1; | |
946 | } else { | |
947 | if (*line == '\n') | |
948 | /* dump the whole remainder of the buffer */ | |
949 | next = tail; | |
950 | in_signature = 0; | |
951 | } | |
952 | line = next; | |
953 | } | |
954 | ||
955 | if (sig_start) | |
956 | strbuf_remove(buf, sig_start - buf->buf, sig_end - sig_start); | |
957 | ||
958 | return sig_start != NULL; | |
959 | } | |
960 | ||
5231c633 JH |
961 | static void handle_signed_tag(struct commit *parent, struct commit_extra_header ***tail) |
962 | { | |
963 | struct merge_remote_desc *desc; | |
964 | struct commit_extra_header *mergetag; | |
965 | char *buf; | |
966 | unsigned long size, len; | |
967 | enum object_type type; | |
968 | ||
969 | desc = merge_remote_util(parent); | |
970 | if (!desc || !desc->obj) | |
971 | return; | |
b4f5aca4 | 972 | buf = read_object_file(&desc->obj->oid, &type, &size); |
5231c633 JH |
973 | if (!buf || type != OBJ_TAG) |
974 | goto free_return; | |
975 | len = parse_signature(buf, size); | |
976 | if (size == len) | |
977 | goto free_return; | |
978 | /* | |
979 | * We could verify this signature and either omit the tag when | |
980 | * it does not validate, but the integrator may not have the | |
981 | * public key of the signer of the tag he is merging, while a | |
982 | * later auditor may have it while auditing, so let's not run | |
983 | * verify-signed-buffer here for now... | |
984 | * | |
985 | * if (verify_signed_buffer(buf, len, buf + len, size - len, ...)) | |
986 | * warn("warning: signed tag unverified."); | |
987 | */ | |
988 | mergetag = xcalloc(1, sizeof(*mergetag)); | |
989 | mergetag->key = xstrdup("mergetag"); | |
990 | mergetag->value = buf; | |
991 | mergetag->len = size; | |
992 | ||
993 | **tail = mergetag; | |
994 | *tail = &mergetag->next; | |
995 | return; | |
996 | ||
997 | free_return: | |
998 | free(buf); | |
999 | } | |
1000 | ||
434060ec | 1001 | int check_commit_signature(const struct commit *commit, struct signature_check *sigc) |
ffb6d7d5 SG |
1002 | { |
1003 | struct strbuf payload = STRBUF_INIT; | |
1004 | struct strbuf signature = STRBUF_INIT; | |
434060ec | 1005 | int ret = 1; |
ffb6d7d5 SG |
1006 | |
1007 | sigc->result = 'N'; | |
1008 | ||
218aa3a6 | 1009 | if (parse_signed_commit(commit, &payload, &signature) <= 0) |
ffb6d7d5 | 1010 | goto out; |
434060ec | 1011 | ret = check_signature(payload.buf, payload.len, signature.buf, |
1012 | signature.len, sigc); | |
ffb6d7d5 SG |
1013 | |
1014 | out: | |
ffb6d7d5 SG |
1015 | strbuf_release(&payload); |
1016 | strbuf_release(&signature); | |
434060ec | 1017 | |
1018 | return ret; | |
ffb6d7d5 SG |
1019 | } |
1020 | ||
1021 | ||
1022 | ||
5231c633 JH |
1023 | void append_merge_tag_headers(struct commit_list *parents, |
1024 | struct commit_extra_header ***tail) | |
1025 | { | |
1026 | while (parents) { | |
1027 | struct commit *parent = parents->item; | |
1028 | handle_signed_tag(parent, tail); | |
1029 | parents = parents->next; | |
1030 | } | |
1031 | } | |
1032 | ||
1033 | static void add_extra_header(struct strbuf *buffer, | |
1034 | struct commit_extra_header *extra) | |
1035 | { | |
1036 | strbuf_addstr(buffer, extra->key); | |
ed7a42a0 JH |
1037 | if (extra->len) |
1038 | strbuf_add_lines(buffer, " ", extra->value, extra->len); | |
1039 | else | |
1040 | strbuf_addch(buffer, '\n'); | |
1041 | } | |
1042 | ||
c871a1d1 JH |
1043 | struct commit_extra_header *read_commit_extra_headers(struct commit *commit, |
1044 | const char **exclude) | |
ed7a42a0 JH |
1045 | { |
1046 | struct commit_extra_header *extra = NULL; | |
1047 | unsigned long size; | |
218aa3a6 JK |
1048 | const char *buffer = get_commit_buffer(commit, &size); |
1049 | extra = read_commit_extra_header_lines(buffer, size, exclude); | |
1050 | unuse_commit_buffer(commit, buffer); | |
ed7a42a0 JH |
1051 | return extra; |
1052 | } | |
1053 | ||
fef461ea | 1054 | int for_each_mergetag(each_mergetag_fn fn, struct commit *commit, void *data) |
063da62b CC |
1055 | { |
1056 | struct commit_extra_header *extra, *to_free; | |
fef461ea | 1057 | int res = 0; |
063da62b CC |
1058 | |
1059 | to_free = read_commit_extra_headers(commit, NULL); | |
fef461ea | 1060 | for (extra = to_free; !res && extra; extra = extra->next) { |
063da62b CC |
1061 | if (strcmp(extra->key, "mergetag")) |
1062 | continue; /* not a merge tag */ | |
fef461ea | 1063 | res = fn(commit, extra, data); |
063da62b CC |
1064 | } |
1065 | free_commit_extra_headers(to_free); | |
fef461ea | 1066 | return res; |
063da62b CC |
1067 | } |
1068 | ||
ed7a42a0 JH |
1069 | static inline int standard_header_field(const char *field, size_t len) |
1070 | { | |
b072504c RS |
1071 | return ((len == 4 && !memcmp(field, "tree", 4)) || |
1072 | (len == 6 && !memcmp(field, "parent", 6)) || | |
1073 | (len == 6 && !memcmp(field, "author", 6)) || | |
1074 | (len == 9 && !memcmp(field, "committer", 9)) || | |
1075 | (len == 8 && !memcmp(field, "encoding", 8))); | |
ed7a42a0 JH |
1076 | } |
1077 | ||
c871a1d1 JH |
1078 | static int excluded_header_field(const char *field, size_t len, const char **exclude) |
1079 | { | |
1080 | if (!exclude) | |
1081 | return 0; | |
1082 | ||
1083 | while (*exclude) { | |
1084 | size_t xlen = strlen(*exclude); | |
b072504c | 1085 | if (len == xlen && !memcmp(field, *exclude, xlen)) |
c871a1d1 JH |
1086 | return 1; |
1087 | exclude++; | |
1088 | } | |
1089 | return 0; | |
1090 | } | |
1091 | ||
82a75299 JH |
1092 | static struct commit_extra_header *read_commit_extra_header_lines( |
1093 | const char *buffer, size_t size, | |
1094 | const char **exclude) | |
ed7a42a0 JH |
1095 | { |
1096 | struct commit_extra_header *extra = NULL, **tail = &extra, *it = NULL; | |
1097 | const char *line, *next, *eof, *eob; | |
1098 | struct strbuf buf = STRBUF_INIT; | |
1099 | ||
1100 | for (line = buffer, eob = line + size; | |
1101 | line < eob && *line != '\n'; | |
1102 | line = next) { | |
1103 | next = memchr(line, '\n', eob - line); | |
1104 | next = next ? next + 1 : eob; | |
1105 | if (*line == ' ') { | |
1106 | /* continuation */ | |
1107 | if (it) | |
1108 | strbuf_add(&buf, line + 1, next - (line + 1)); | |
1109 | continue; | |
1110 | } | |
1111 | if (it) | |
1112 | it->value = strbuf_detach(&buf, &it->len); | |
1113 | strbuf_reset(&buf); | |
1114 | it = NULL; | |
1115 | ||
50a01cc4 RS |
1116 | eof = memchr(line, ' ', next - line); |
1117 | if (!eof) | |
ed7a42a0 | 1118 | eof = next; |
b072504c RS |
1119 | else if (standard_header_field(line, eof - line) || |
1120 | excluded_header_field(line, eof - line, exclude)) | |
ed7a42a0 JH |
1121 | continue; |
1122 | ||
1123 | it = xcalloc(1, sizeof(*it)); | |
1124 | it->key = xmemdupz(line, eof-line); | |
1125 | *tail = it; | |
1126 | tail = &it->next; | |
1127 | if (eof + 1 < next) | |
1128 | strbuf_add(&buf, eof + 1, next - (eof + 1)); | |
1129 | } | |
1130 | if (it) | |
1131 | it->value = strbuf_detach(&buf, &it->len); | |
1132 | return extra; | |
5231c633 JH |
1133 | } |
1134 | ||
1135 | void free_commit_extra_headers(struct commit_extra_header *extra) | |
1136 | { | |
1137 | while (extra) { | |
1138 | struct commit_extra_header *next = extra->next; | |
1139 | free(extra->key); | |
1140 | free(extra->value); | |
1141 | free(extra); | |
1142 | extra = next; | |
1143 | } | |
1144 | } | |
1145 | ||
5078f344 PO |
1146 | int commit_tree(const char *msg, size_t msg_len, const struct object_id *tree, |
1147 | struct commit_list *parents, struct object_id *ret, | |
ba3c69a9 | 1148 | const char *author, const char *sign_commit) |
5231c633 JH |
1149 | { |
1150 | struct commit_extra_header *extra = NULL, **tail = &extra; | |
1151 | int result; | |
1152 | ||
1153 | append_merge_tag_headers(parents, &tail); | |
3ffefb54 | 1154 | result = commit_tree_extended(msg, msg_len, tree, parents, ret, |
ba3c69a9 | 1155 | author, sign_commit, extra); |
5231c633 JH |
1156 | free_commit_extra_headers(extra); |
1157 | return result; | |
1158 | } | |
1159 | ||
08a94a14 LT |
1160 | static int find_invalid_utf8(const char *buf, int len) |
1161 | { | |
1162 | int offset = 0; | |
e82bd6cc | 1163 | static const unsigned int max_codepoint[] = { |
1164 | 0x7f, 0x7ff, 0xffff, 0x10ffff | |
1165 | }; | |
08a94a14 LT |
1166 | |
1167 | while (len) { | |
1168 | unsigned char c = *buf++; | |
1169 | int bytes, bad_offset; | |
28110d4b | 1170 | unsigned int codepoint; |
e82bd6cc | 1171 | unsigned int min_val, max_val; |
08a94a14 LT |
1172 | |
1173 | len--; | |
1174 | offset++; | |
1175 | ||
1176 | /* Simple US-ASCII? No worries. */ | |
1177 | if (c < 0x80) | |
1178 | continue; | |
1179 | ||
1180 | bad_offset = offset-1; | |
1181 | ||
1182 | /* | |
1183 | * Count how many more high bits set: that's how | |
1184 | * many more bytes this sequence should have. | |
1185 | */ | |
1186 | bytes = 0; | |
1187 | while (c & 0x40) { | |
1188 | c <<= 1; | |
1189 | bytes++; | |
1190 | } | |
1191 | ||
28110d4b | 1192 | /* |
1193 | * Must be between 1 and 3 more bytes. Longer sequences result in | |
1194 | * codepoints beyond U+10FFFF, which are guaranteed never to exist. | |
1195 | */ | |
1196 | if (bytes < 1 || 3 < bytes) | |
08a94a14 LT |
1197 | return bad_offset; |
1198 | ||
1199 | /* Do we *have* that many bytes? */ | |
1200 | if (len < bytes) | |
1201 | return bad_offset; | |
1202 | ||
e82bd6cc | 1203 | /* |
1204 | * Place the encoded bits at the bottom of the value and compute the | |
1205 | * valid range. | |
1206 | */ | |
28110d4b | 1207 | codepoint = (c & 0x7f) >> bytes; |
e82bd6cc | 1208 | min_val = max_codepoint[bytes-1] + 1; |
1209 | max_val = max_codepoint[bytes]; | |
28110d4b | 1210 | |
08a94a14 LT |
1211 | offset += bytes; |
1212 | len -= bytes; | |
1213 | ||
1214 | /* And verify that they are good continuation bytes */ | |
1215 | do { | |
28110d4b | 1216 | codepoint <<= 6; |
1217 | codepoint |= *buf & 0x3f; | |
08a94a14 LT |
1218 | if ((*buf++ & 0xc0) != 0x80) |
1219 | return bad_offset; | |
1220 | } while (--bytes); | |
1221 | ||
e82bd6cc | 1222 | /* Reject codepoints that are out of range for the sequence length. */ |
1223 | if (codepoint < min_val || codepoint > max_val) | |
28110d4b | 1224 | return bad_offset; |
1225 | /* Surrogates are only for UTF-16 and cannot be encoded in UTF-8. */ | |
1226 | if ((codepoint & 0x1ff800) == 0xd800) | |
1227 | return bad_offset; | |
81050ac6 | 1228 | /* U+xxFFFE and U+xxFFFF are guaranteed non-characters. */ |
dc773a67 | 1229 | if ((codepoint & 0xfffe) == 0xfffe) |
81050ac6 PK |
1230 | return bad_offset; |
1231 | /* So are anything in the range U+FDD0..U+FDEF. */ | |
1232 | if (codepoint >= 0xfdd0 && codepoint <= 0xfdef) | |
28110d4b | 1233 | return bad_offset; |
08a94a14 LT |
1234 | } |
1235 | return -1; | |
1236 | } | |
1237 | ||
1238 | /* | |
1239 | * This verifies that the buffer is in proper utf8 format. | |
1240 | * | |
1241 | * If it isn't, it assumes any non-utf8 characters are Latin1, | |
1242 | * and does the conversion. | |
08a94a14 LT |
1243 | */ |
1244 | static int verify_utf8(struct strbuf *buf) | |
1245 | { | |
1246 | int ok = 1; | |
1247 | long pos = 0; | |
1248 | ||
1249 | for (;;) { | |
1250 | int bad; | |
1251 | unsigned char c; | |
1252 | unsigned char replace[2]; | |
1253 | ||
1254 | bad = find_invalid_utf8(buf->buf + pos, buf->len - pos); | |
1255 | if (bad < 0) | |
1256 | return ok; | |
1257 | pos += bad; | |
1258 | ok = 0; | |
1259 | c = buf->buf[pos]; | |
1260 | strbuf_remove(buf, pos, 1); | |
1261 | ||
1262 | /* We know 'c' must be in the range 128-255 */ | |
1263 | replace[0] = 0xc0 + (c >> 6); | |
1264 | replace[1] = 0x80 + (c & 0x3f); | |
1265 | strbuf_insert(buf, pos, replace, 2); | |
1266 | pos += 2; | |
1267 | } | |
1268 | } | |
1269 | ||
40d52ff7 | 1270 | static const char commit_utf8_warn[] = |
4fa4b315 VA |
1271 | N_("Warning: commit message did not conform to UTF-8.\n" |
1272 | "You may want to amend it after fixing the message, or set the config\n" | |
1273 | "variable i18n.commitencoding to the encoding your project uses.\n"); | |
40d52ff7 | 1274 | |
3ffefb54 | 1275 | int commit_tree_extended(const char *msg, size_t msg_len, |
5078f344 PO |
1276 | const struct object_id *tree, |
1277 | struct commit_list *parents, struct object_id *ret, | |
ba3c69a9 JH |
1278 | const char *author, const char *sign_commit, |
1279 | struct commit_extra_header *extra) | |
40d52ff7 JK |
1280 | { |
1281 | int result; | |
1282 | int encoding_is_utf8; | |
1283 | struct strbuf buffer; | |
1284 | ||
e816caa0 | 1285 | assert_oid_type(tree, OBJ_TREE); |
40d52ff7 | 1286 | |
3ffefb54 | 1287 | if (memchr(msg, '\0', msg_len)) |
37576c14 NTND |
1288 | return error("a NUL byte in commit log message not allowed."); |
1289 | ||
40d52ff7 JK |
1290 | /* Not having i18n.commitencoding is the same as having utf-8 */ |
1291 | encoding_is_utf8 = is_encoding_utf8(git_commit_encoding); | |
1292 | ||
1293 | strbuf_init(&buffer, 8192); /* should avoid reallocs for the headers */ | |
5078f344 | 1294 | strbuf_addf(&buffer, "tree %s\n", oid_to_hex(tree)); |
40d52ff7 JK |
1295 | |
1296 | /* | |
1297 | * NOTE! This ordering means that the same exact tree merged with a | |
1298 | * different order of parents will be a _different_ changeset even | |
1299 | * if everything else stays the same. | |
1300 | */ | |
1301 | while (parents) { | |
e510ab89 | 1302 | struct commit *parent = pop_commit(&parents); |
40d52ff7 | 1303 | strbuf_addf(&buffer, "parent %s\n", |
f2fd0760 | 1304 | oid_to_hex(&parent->object.oid)); |
40d52ff7 JK |
1305 | } |
1306 | ||
1307 | /* Person/date information */ | |
1308 | if (!author) | |
f9bc573f | 1309 | author = git_author_info(IDENT_STRICT); |
40d52ff7 | 1310 | strbuf_addf(&buffer, "author %s\n", author); |
f9bc573f | 1311 | strbuf_addf(&buffer, "committer %s\n", git_committer_info(IDENT_STRICT)); |
40d52ff7 JK |
1312 | if (!encoding_is_utf8) |
1313 | strbuf_addf(&buffer, "encoding %s\n", git_commit_encoding); | |
5231c633 JH |
1314 | |
1315 | while (extra) { | |
1316 | add_extra_header(&buffer, extra); | |
1317 | extra = extra->next; | |
1318 | } | |
40d52ff7 JK |
1319 | strbuf_addch(&buffer, '\n'); |
1320 | ||
1321 | /* And add the comment */ | |
3ffefb54 | 1322 | strbuf_add(&buffer, msg, msg_len); |
40d52ff7 JK |
1323 | |
1324 | /* And check the encoding */ | |
08a94a14 | 1325 | if (encoding_is_utf8 && !verify_utf8(&buffer)) |
4fa4b315 | 1326 | fprintf(stderr, _(commit_utf8_warn)); |
40d52ff7 | 1327 | |
e505146d RS |
1328 | if (sign_commit && do_sign_commit(&buffer, sign_commit)) { |
1329 | result = -1; | |
1330 | goto out; | |
1331 | } | |
ba3c69a9 | 1332 | |
a09c985e | 1333 | result = write_object_file(buffer.buf, buffer.len, commit_type, ret); |
e505146d | 1334 | out: |
40d52ff7 JK |
1335 | strbuf_release(&buffer); |
1336 | return result; | |
1337 | } | |
ae8e4c9c | 1338 | |
e2e5ac23 NTND |
1339 | define_commit_slab(merge_desc_slab, struct merge_remote_desc *); |
1340 | static struct merge_desc_slab merge_desc_slab = COMMIT_SLAB_INIT(1, merge_desc_slab); | |
1341 | ||
1342 | struct merge_remote_desc *merge_remote_util(struct commit *commit) | |
1343 | { | |
1344 | return *merge_desc_slab_at(&merge_desc_slab, commit); | |
1345 | } | |
1346 | ||
beb518c9 RS |
1347 | void set_merge_remote_desc(struct commit *commit, |
1348 | const char *name, struct object *obj) | |
1349 | { | |
1350 | struct merge_remote_desc *desc; | |
5447a76a | 1351 | FLEX_ALLOC_STR(desc, name, name); |
beb518c9 | 1352 | desc->obj = obj; |
e2e5ac23 | 1353 | *merge_desc_slab_at(&merge_desc_slab, commit) = desc; |
beb518c9 RS |
1354 | } |
1355 | ||
ae8e4c9c JH |
1356 | struct commit *get_merge_parent(const char *name) |
1357 | { | |
1358 | struct object *obj; | |
1359 | struct commit *commit; | |
7683e2e6 | 1360 | struct object_id oid; |
e82caf38 | 1361 | if (get_oid(name, &oid)) |
ae8e4c9c | 1362 | return NULL; |
109cd76d | 1363 | obj = parse_object(the_repository, &oid); |
ae8e4c9c | 1364 | commit = (struct commit *)peel_to_type(name, 0, obj, OBJ_COMMIT); |
e2e5ac23 | 1365 | if (commit && !merge_remote_util(commit)) |
beb518c9 | 1366 | set_merge_remote_desc(commit, name, obj); |
ae8e4c9c JH |
1367 | return commit; |
1368 | } | |
89b5f1d9 RS |
1369 | |
1370 | /* | |
1371 | * Append a commit to the end of the commit_list. | |
1372 | * | |
1373 | * next starts by pointing to the variable that holds the head of an | |
1374 | * empty commit_list, and is updated to point to the "next" field of | |
1375 | * the last item on the list as new commits are appended. | |
1376 | * | |
1377 | * Usage example: | |
1378 | * | |
1379 | * struct commit_list *list; | |
1380 | * struct commit_list **next = &list; | |
1381 | * | |
1382 | * next = commit_list_append(c1, next); | |
1383 | * next = commit_list_append(c2, next); | |
1384 | * assert(commit_list_count(list) == 2); | |
1385 | * return list; | |
1386 | */ | |
1387 | struct commit_list **commit_list_append(struct commit *commit, | |
1388 | struct commit_list **next) | |
1389 | { | |
258c03eb BW |
1390 | struct commit_list *new_commit = xmalloc(sizeof(struct commit_list)); |
1391 | new_commit->item = commit; | |
1392 | *next = new_commit; | |
1393 | new_commit->next = NULL; | |
1394 | return &new_commit->next; | |
89b5f1d9 | 1395 | } |
efc7df45 | 1396 | |
fe6eb7f2 JK |
1397 | const char *find_commit_header(const char *msg, const char *key, size_t *out_len) |
1398 | { | |
1399 | int key_len = strlen(key); | |
1400 | const char *line = msg; | |
1401 | ||
1402 | while (line) { | |
1403 | const char *eol = strchrnul(line, '\n'); | |
1404 | ||
1405 | if (line == eol) | |
1406 | return NULL; | |
1407 | ||
1408 | if (eol - line > key_len && | |
1409 | !strncmp(line, key, key_len) && | |
1410 | line[key_len] == ' ') { | |
1411 | *out_len = eol - line - key_len - 1; | |
1412 | return line + key_len + 1; | |
1413 | } | |
1414 | line = *eol ? eol + 1 : NULL; | |
1415 | } | |
1416 | return NULL; | |
1417 | } | |
0ed8a4e1 | 1418 | |
8c384589 | 1419 | /* |
710714aa | 1420 | * Inspect the given string and determine the true "end" of the log message, in |
8c384589 | 1421 | * order to find where to put a new Signed-off-by: line. Ignored are |
d76650b8 BM |
1422 | * trailing comment lines and blank lines. To support "git commit -s |
1423 | * --amend" on an existing commit, we also ignore "Conflicts:". To | |
1424 | * support "git commit -v", we truncate at cut lines. | |
8c384589 CC |
1425 | * |
1426 | * Returns the number of bytes from the tail to ignore, to be fed as | |
1427 | * the second parameter to append_signoff(). | |
1428 | */ | |
66e83d9b | 1429 | size_t ignore_non_trailer(const char *buf, size_t len) |
8c384589 | 1430 | { |
66e83d9b JK |
1431 | size_t boc = 0; |
1432 | size_t bol = 0; | |
8c384589 | 1433 | int in_old_conflicts_block = 0; |
d76650b8 | 1434 | size_t cutoff = wt_status_locate_end(buf, len); |
8c384589 | 1435 | |
d76650b8 | 1436 | while (bol < cutoff) { |
710714aa | 1437 | const char *next_line = memchr(buf + bol, '\n', len - bol); |
8c384589 | 1438 | |
710714aa JT |
1439 | if (!next_line) |
1440 | next_line = buf + len; | |
8c384589 CC |
1441 | else |
1442 | next_line++; | |
1443 | ||
710714aa | 1444 | if (buf[bol] == comment_line_char || buf[bol] == '\n') { |
8c384589 CC |
1445 | /* is this the first of the run of comments? */ |
1446 | if (!boc) | |
1447 | boc = bol; | |
1448 | /* otherwise, it is just continuing */ | |
710714aa | 1449 | } else if (starts_with(buf + bol, "Conflicts:\n")) { |
8c384589 CC |
1450 | in_old_conflicts_block = 1; |
1451 | if (!boc) | |
1452 | boc = bol; | |
710714aa | 1453 | } else if (in_old_conflicts_block && buf[bol] == '\t') { |
8c384589 CC |
1454 | ; /* a pathname in the conflicts block */ |
1455 | } else if (boc) { | |
1456 | /* the previous was not trailing comment */ | |
1457 | boc = 0; | |
1458 | in_old_conflicts_block = 0; | |
1459 | } | |
710714aa | 1460 | bol = next_line - buf; |
8c384589 | 1461 | } |
d76650b8 | 1462 | return boc ? len - boc : len - cutoff; |
8c384589 | 1463 | } |